Huthi rebel fighters stand guard after a reported air strike carried out by the Saudi-led coalition targeted the presidential palace in the Yemeni capital Sanaa on December 5, 2017.
Saudi-led warplanes pounded the rebel-held capital before dawn after the rebels killed former president Ali Abdullah Saleh as he fled the city following the collapse of their uneasy alliance, residents said. / AFP PHOTO / Mohammed HUWAIS
Houthi rebel fighters stand guard after a reported air strike on the presidential palace in the Yemeni capital Sanaa on December 5, 2017. Mohammed Huwais / AFP

Yemen in flux: the only certainty is there is no certainty